步进式电子变阻器的直流电动机调速技术

介绍了多级电子分挡调速技术。采用步进式电子变阻器和晶闸管,研制了新型的直流电动机调速电路。它能使速度的变化逐级平缓地进行,没有跳变现象。电路设计为闭环控制形式。能自动用多种条件完成对直流电动机的控制,并减少功耗。该技术已用在电瓶叉车上,能保证叉车起步平稳,有效地防止因速度跳变而对机械传动装置产生极大的冲击力。用逻辑电路设计了失控保护电路,保证运行安全,还能实现联锁及安全自保功能。电路设计还避免了接触器触点带电闭合。产生了良好的经济效益和生产效益,在电机控制技术中有广阔的发展空间。

Multi-step electronic-gear adjustable-speed technology is introduced.New DC motor adjustable-speed circuit with stepping electronic rheostad and thyristor is developed,which features smoothly progressive speed change without skipping,closed-loop control and reduced power loss.This technology has been used in forklift truck,ensuring that the forklift truck start smoothly and avoiding great impact on mechanical transmission mechanism due to speed skipping.Logical protective circuit is designed for the forklift truck safe operation and the realization of interlock and self-protection functions.Also,charged contact problem with the contactor is relieved.This technology can bring great benefits in economy and production and will inevitably become a motor control technology with bright application prospect.